Banca de DEFESA: IDRIÇA CASSAMA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : IDRIÇA CASSAMA
DATE: 30/07/2020
TIME: 08:30
LOCAL: Sala Virtual
TITLE:

PHYSICAL, CHEMICAL AND GERMINATIVE CHARACTERISTICS OF Pityrocarpa moniliformis (Benth) and Senna siamea (Lam) SEEDS TREATED WITH ATMOSPHERIC PLASMA

KEY WORDS:

vigor, dormancy, dielectric barrier discharge

PAGES: 57
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Silvicultura
SPECIALTY: Sementes Florestais
SUMMARY:

Plasma can directly affect the chemical and physical structure of seeds. The objective of this study was to evaluate the effect of plasma, generated by a dielectric barrier discharge source (DBD), on the physical, chemical and germination characteristics of Pityrocarpa moniliformis (Benth) and Senna siamea (Lam) seeds. The seeds of both species were submitted to plasma in a coplanar plate covered by a petri dish of similar dimensions, the conditions of the plasma environment were obtained using the DBD generating source and the flow applied in the pulse to generate plasma occurred continuously, with a voltage of 10 KV at a working frequency of 4,000 Hertz, in an exposure time of 10 minutes. The physical-chemical alterations were diagnosed through the surface characterization using scanning electron microscopy (SEM) technique and the crack areas were calculated in percentage using the imageJ® software. The chemical analysis was carried out through infrared spectroscopy with Fourier transformation, in the Total Attenuated Reflection (FTIR-ATR) configuration. For physiological analyzes, a completely randomized design was used with four replications of 25 seeds for each species in a controlled environment at 25 0 C, the seeds were distributed on germitest paper, and kept for a period of 18 days in a cold chamber. The data were subjected to analysis of variance and the treatment means were compared at a significance level of 5% probability using the Tukey test. With the results obtained it is concluded that the DBD plasma was presented as an efficient technique, modified the physical structure and changed the chemical properties and provided an improvement in the seed germination of the species.

BANKING MEMBERS:
Presidente - 1880265 - MARCIO DIAS PEREIRA
Externo ao Programa - 237.030.834-68 - RISELANE DE LUCENA ALCÂNTARA BRUNO - UFPB
Externo ao Programa - 3217517 - UBIRATAN CORREIA SILVA
Externo à Instituição - CHARLINE ZARATIN ALVES - UFMS
Externa à Instituição - DINNARA LAYZA SOUZA DA SILVA - UESPI